MRCOOL Olympus 18,000 BTU multi-zone outdoor unit
MRCOOL Olympus · Multi-zone outdoor units · 18,000 BTU
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MRCOOL Olympus 18,000 BTU multi-zone outdoor unit (MULTI3-18HP230C-O) is a 18,000 BTU multi-zone outdoor unit from MRCOOL Olympus. It runs on 208/230V, runs up to 3 indoor units, is rated 25.1 SEER2, has an HSPF2 of 9.8, uses R-454B refrigerant, and carries a 7-year compressor warranty.
| Category | Multi-zone outdoor units |
|---|---|
| Model number | MULTI3-18HP230C-Odoxrepo.mrcool.com |
| Size ? | 18,000 BTU/hdoxrepo.mrcool.com |
| Voltage ? | 208/230Vdoxrepo.mrcool.com |
| Indoor units it runs | 3doxrepo.mrcool.com |
| SEER2 (cooling efficiency) ? | 25.1doxrepo.mrcool.com |
| EER2 (efficiency at 95 °F) ? | 14doxrepo.mrcool.com |
| HSPF2 (heating efficiency) ? | 9.8doxrepo.mrcool.com |
| Rated cooling capacity ? | 18,000 BTU/henergystar.gov |
| Heating capacity at 47 °F ? | 19,000 BTU/henergystar.gov |
| Heating capacity at 17 °F ? | 16,000 BTU/henergystar.gov |
| Heating capacity at 5 °F ? | — |
| COP at 5 °F ? | 2.3energystar.gov |
| Heats down to ? | — |
| Refrigerant ? | R-454Benergystar.gov |
| ENERGY STAR certified ? | yesenergystar.gov |
| ENERGY STAR cold climate ? | yesenergystar.gov |
| Line connection ? | Flaredoxrepo.mrcool.com |
| Wi-Fi control | — |
| Outdoor sound level | — |
| Compressor warranty ? | 7 yearsdoxrepo.mrcool.com |
| Parts warranty ? | 5 yearsdoxrepo.mrcool.com |
| Warranty if you install it yourself ? | Keptdoxrepo.mrcool.com |
| Sold as | Single product |
| Availability | Sold by several retailers |
Warranty, and installing it yourself
Self-installing keeps the warranty, by MRCOOL's own terms.
"This warranty applies only to systems that are installed according to the installation instructions, and in accordance with all applicable local, state or province, and federal laws and regulations including but not limited to electrical codes and permits."
From doxrepo.mrcool.com ↗, read 2026-10-14. Terms change, and local law can require a licensed technician for refrigerant or electrical work whatever the warranty says.
- 7 years on the compressor
- 5 years on parts
"The unit comes standard with a five (5) year parts and seven (7) year compressor warranty."
From doxrepo.mrcool.com ↗, read 2026-10-14.
Who makes it
inferred Most likely made by Midea. Its ENERGY STAR certification lists exactly the same figures (capacity at 47, 17 and 5 °F, SEER2, EER2, HSPF2, COP and refrigerant) as a model Midea certifies under its own name. the Midea record ↗
ENERGY STAR record 4016548 (MRCOOL MULTI3-18HP230C-O) has the same cooling and heating capacities, SEER2, EER2, HSPF2, COP at 5 °F and refrigerant as record 3893482 (MDV M3OX430-18HFN10-M1-D), which GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD. certifies itself. 62 records from other certifiers share the set.
Also certified with identical figures by 1HVAC, AC PRO, ACIQ, AI AIR CONDITIONING, Airquest, ApooDr, AproDr, Arcoaire, BLUERIDGE, Bosch, Breeze33, Bryant, CanAir, Carrier and 36 more.
Where this came from
confirmed The part number and every spec shown were read from the brand's or a store's own material: a product page, a spec sheet or a product feed, or an archived copy of one. Last verified 2026-10-14. What the labels mean.
The equivalent in other lines
Same category, same size (18k), 208/230V, from other lines; cheapest first, at most two per line. Open any of them side by side with this multi-zone outdoor unit, or tick several to compare up to four.
| Logo | Brand | Product | Category | Photo | Price |
|---|---|---|---|---|---|
| Pioneer | 18,000 BTU 2-zone multi-zone outdoor unit (YNL-24) Pioneer Quantum Ultra Side by side → | Multi-zone outdoor units | $1,298 | ||
| MRCOOL | 18,000 BTU multi-zone outdoor unit MRCOOL DIY 5th Gen Side by side → | Multi-zone outdoor units | $1,508 |